I’ve seen this one requested for a while – since my original Shiro, Long Tails arrangement back in 2006.
Here is some sheet music I arranged for Rakuen, from Wolf’s Rain. Downloads available on Sheethost.
Wolf’s Rain was one of the first anime series I watched in its entirety. I improvised one of the prettiest songs from the series, Shiro, Long Tails. I later went back and transcribed/arranged sheet music for the song. This is one of the first songs I ever arranged — it dates back to late 2006, so expect errors.